Steam generator Mr. Steam or Steammist?

Any opinions or ratings of one brand VS another? We know that we will need a 7W model but haven't been able to find pros/ cons on one brand VS another. We know that we want to forgo the "Instant" steam function because it wastes energy, as it is always on. So for that reason and price we have ruled out Thermasol. Mr. Steam, Steamist and Kohler are readily available as we live in NJ.

Additionally, can anyone suggest a good Vapor proof (not just waterproof) light for inside the shower?

Thanks
We have been to the John Bridge site and have found it to be very helpful but not on these specific questions.